往复运动下仿生非光滑表面耐磨性能研究

发布时间：2019-04-24 07:57

【摘要】：摩擦在日常生产实践中其扮演着双面角色,没有它,人们“寸步难行”,有了它,磨损等一系列问题接踵而至,为了能够驾驭这一匹“骏马”,人们对其进行了长期的研究。随着近几年仿生学的发展,一部分科研工作者业已着手将仿生学和摩擦学研究结合,仿生非光滑表面结构即在此大背景下面产生,现有的研究结果表明仿生非光滑表面结构在提高摩擦学性能方面有着不凡的表现。在仿生非光滑表面结构的摩擦学性能方面的研究工作中,对于耐磨性研究则相对较少。现有对仿生非光滑表面耐磨性能研究往往集中在理论、仿真和标准试验机试验的研究方面,很少根据实际工况条件展开相关研究；磨损变化伴随着摩擦副的生命周期,现有在耐磨性方面的研究存在着试验周期过短、数据采集量过少等问题；同时在对仿生非光滑表面耐磨机理的探讨方面往往止于概念,例如其“储屑”作用等,只是概念的提出,并未深入挖掘其内在机理以及相关联的作用。本文针对上述研究现状,围绕往复运动下仿生非光滑表面耐磨性能展开相应的研究,研究工作主要包括：1、研发一款适用于直线往复运动的专用摩擦磨损试验机；2、进行试件摩擦磨损试验并对试验数据统计分析；3、探讨往复运动下仿生非光滑表面耐磨作用机理。首先,根据机械系统的创新设计方法原理,构建了基于直线往复运动的摩擦磨损试验机的功能结构图,形成一种新式直线往复式摩擦磨损试验机的设计方案。对于摩擦磨损试验机的机械系统,进行了结构设计、导轨选型等工作,并最终制造装配出符合要求的摩擦磨损试验机。其次,拟定试验方案并加工相关试验试件,在充分准备的情况下开展往复运动下仿生非光滑表面的摩擦磨损试验并对数据进行采集统计分析。最后,就非光滑表面结构“平整”作用、“储屑”作用、对流体动力润滑的影响、“变形”作用、结构参数影响以及在全生命周期中的作用对往复运动下仿生非光滑表面耐磨作用机理进行了研究。本文主要通过试验与机理探讨对往复运动下仿生非光滑表面耐磨性能进行研究,在具体的工作内容中,试验机的成功开发使得试验环境更贴近于真实的使用工况；充足的试验周期保证了试验数据的采集量以及稳定性,为后期作用机理探讨提供了可靠的基础数据；结合试验数据及相关研究成果对仿生非光滑表面耐磨作用机理的深入探讨对今后仿生非光滑表面的研究工作具有参考意义。
[Abstract]:Friction plays a double-sided role in daily production practice. Without it, people are difficult to walk, with it, wear and tear and so on a series of problems ensue, in order to be able to control this "horse", people have carried on a long-term research to it. With the development of bionics in recent years, some researchers have begun to combine bionics and tribology research, and the bionic non-smooth surface structure is produced under this background. The existing research results show that bionic non-smooth surface structure has a remarkable performance in improving tribological properties. In the research work of tribological properties of biomimetic non-smooth surface structure, there is relatively little research on wear resistance. The existing research on the wear resistance of bionic non-smooth surface is usually focused on the theoretical, simulation and standard testing machine tests, but few researches are carried out according to the actual operating conditions. The wear change is accompanied by the life cycle of friction pairs. There are some problems in the research of wear resistance, such as too short test cycle, too little data collection and so on. At the same time, the discussion on the wear-resisting mechanism of bionic non-smooth surface is often limited to the concept, such as its "chip storage" effect, etc., but the concept is only put forward, and the internal mechanism and the related function are not explored deeply. In view of the above-mentioned research situation, the corresponding research on the wear resistance of bionic non-smooth surface under reciprocating motion is carried out. The research work mainly includes: 1. A special friction and wear tester suitable for linear reciprocating motion is developed; 2. The friction and wear tests of the specimens are carried out and the experimental data are statistically analyzed. 3. The mechanism of wear resistance of bionic non-smooth surfaces under reciprocating motion is discussed. Firstly, according to the principle of innovative design method of mechanical system, the function and structure diagram of friction and wear tester based on linear reciprocating motion is constructed, and a new design scheme of linear reciprocating friction and wear tester is formed. For the mechanical system of friction and wear testing machine, the structure design, rail selection and so on are carried out. Finally, the friction and wear testing machine is manufactured and assembled in accordance with the requirements of friction and wear testing machine. Secondly, the test scheme is worked out and the related test pieces are processed. The friction and wear tests of the bionic non-smooth surface under reciprocating motion are carried out and the data are collected and analyzed. Finally, on the non-smooth surface structure "smooth" action, "chip storage" effect on hydrodynamic lubrication, "deformation" effect, The mechanism of wear resistance of bionic non-smooth surface under reciprocating motion is studied by the influence of structural parameters and its role in the whole life cycle. In this paper, the wear resistance of bionic and non-smooth surface under reciprocating motion is studied by experiment and mechanism discussion. In the concrete work, the successful development of testing machine makes the test environment more close to the real working condition. Sufficient test cycle ensures the collection and stability of test data, and provides reliable basic data for the discussion of the mechanism of action in later stage. Combined with the experimental data and related research results, the in-depth study on the mechanism of wear resistance of biomimetic non-smooth surfaces is of reference significance for the future research work on biomimetic non-smooth surfaces.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH117

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